R44 BMW F97 X3M & F98 X4M S58 Exhaust Catless Downpipes

The R44 BMW F97 X3M & F98 X4M S58 Exhaust Catless Downpipes are engineered to provide a high-quality, great-value upgrade for owners and tuners looking to unlock the full sound and performance potential of BMW’s S58 twin-turbo engine. Manufactured from durable stainless steel, these downpipes replace the highly restrictive OEM catalytic converters, significantly improving exhaust flow while delivering a far more aggressive exhaust note. Featuring a stepped 3.5″–3.0″ diameter design with an integrated heat shield, they offer excellent thermal control, durability and precise fitment, all while keeping pricing sensible and accessible.Key FeaturesHigh-grade stainless steel constructionCatless / decat design for maximum exhaust flowStepped 3.5″–3.0″ pipe diameterIntegrated heat shield for improved thermal managementMajor reduction in exhaust back pressureFaster turbo spool and reduced turbo lagSharper throttle response and increased exhaust volumeRaises the tuning potential of the S58 engineSupplied with a 1 year R44 Performance warranty and fitment guaranteeEngineered for accurate fitment on F97 X3M and F98 X4M modelsImportant Disclaimer – Motorsport-Use OnlyThese downpipes are strictly for motorsport-use only. Removal of the OEM catalytic converters breaches European and international emissions regulations and may exceed permitted noise limits in certain countries. Vehicles fitted with these downpipes will fail a UK MOT test.Fitting catless downpipes will trigger an engine management light and can place your vehicle into limp mode. Custom coding or aftermarket tuning is required to operate these downpipes correctly. R44 strongly advises use limited to closed-course environments such as track or drag strip applications only.CompatibilityBMW F97 X3M & X3M CompetitionBMW F98 X4M & X4M CompetitionEngine: S58 3.0-litre twin-turbo inline-six